linux-kernel - [PATCH] Bluetooth: hci_event: Fix checking conn for le_conn_complete

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Date:   Tue, 23 Aug 2022 12:39:22 +0800
From:   Archie Pusaka <apusaka@...gle.com>
To:     linux-bluetooth <linux-bluetooth@...r.kernel.org>,
        Luiz Augusto von Dentz <luiz.dentz@...il.com>,
        Marcel Holtmann <marcel@...tmann.org>
Cc:     CrosBT Upstreaming <chromeos-bluetooth-upstreaming@...omium.org>,
        Archie Pusaka <apusaka@...omium.org>,
        Sonny Sasaka <sonnysasaka@...omium.org>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Johan Hedberg <johan.hedberg@...il.com>,
        Paolo Abeni <pabeni@...hat.com>,
        Soenke Huster <soenke.huster@...oes.de>,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: [PATCH] Bluetooth: hci_event: Fix checking conn for le_conn_complete_evt

From: Archie Pusaka <apusaka@...omium.org>

To prevent multiple conn complete events, we shouldn't look up the
conn with hci_lookup_le_connect, since it requires the state to be
BT_CONNECT. By the time the duplicate event is processed, the state
might have changed, so we end up processing the new event anyway.

Change the lookup function to hci_conn_hash_lookup_ba.

Fixes: d5ebaa7c5f6f6 ("Bluetooth: hci_event: Ignore multiple conn complete events")
Signed-off-by: Archie Pusaka <apusaka@...omium.org>
Reviewed-by: Sonny Sasaka <sonnysasaka@...omium.org>

---

 net/bluetooth/hci_event.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index 938abe6352bf..1906822a061b 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -5801,7 +5801,7 @@ static void le_conn_complete_evt(struct hci_dev *hdev, u8 status,
 	 */
 	hci_dev_clear_flag(hdev, HCI_LE_ADV);
 
-	conn = hci_lookup_le_connect(hdev);
+	conn = hci_conn_hash_lookup_ba(hdev, LE_LINK, bdaddr);
 	if (!conn) {
 		/* In case of error status and there is no connection pending
 		 * just unlock as there is nothing to cleanup.
-- 
2.37.1.595.g718a3a8f04-goog